package com.smart.common.config;

import javax.annotation.Resource;
import org.springframework.http.HttpMethod;
import org.springframework.context.annotation.Bean;
import com.smart.common.filter.JwtAuthenticationTokenFilter;
import com.smart.common.handler.RestAuthenticationEntryPoint;
import com.smart.common.handler.RestfulAccessDeniedHandler;
import org.springframework.context.annotation.Configuration;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;

/**
 * @author lgb
 * @date 2020年6月10日 下午12:13:44
 * Copyright (C) 深圳工勘科技
 * @说明: SpringSecurity的配置
 **/
@Configuration
@EnableGlobalMethodSecurity(prePostEnabled=true,securedEnabled=true)
public class SecurityConfig extends WebSecurityConfigurerAdapter{

    /** 自定义用户认证逻辑 */
    @Resource
    private UserDetailsService userDetailsService;
    @Autowired
    private RestfulAccessDeniedHandler restfulAccessDeniedHandler;
    @Autowired
    private RestAuthenticationEntryPoint restAuthenticationEntryPoint;

    /**
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     **/
    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception{
          // 由于使用的是JWT，我们这里不需要csrf
          httpSecurity.csrf().disable()
          // 基于token，所以不需要session
          .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
          // 过滤请求   允许对于网站静态资源的无授权访问
          .authorizeRequests().antMatchers(HttpMethod.GET,
           "/*.html","/favicon.ico","/**/*.html",
           "/**/*.css","/**/*.js","/swagger-resources/**",
           "/v2/api-docs/**","/v2/api-docs-ext/**").permitAll()
           // 对登录注册要允许匿名访问
          .antMatchers("/admin/login","/login/app","/captchaImage").anonymous()
          .antMatchers("/sys/mRecords/export_excel","/sys/attendance/export_excel"
        		  ,"/sys/sswork/export_excel","/sys/site_inspection/export_excel")
          .anonymous()
           // Druid Monitor  允许匿名访问
          .antMatchers("/druid/**").anonymous()
          //跨域请求会先进行一次options请求
          .antMatchers(HttpMethod.OPTIONS).permitAll()
          // 除上面外的所有请求全部需要鉴权认证
           .anyRequest().authenticated().and()
           // springBoot springSecurty: x-frame-options deny禁止iframe调用
           .headers().frameOptions().disable();;
           // 禁用缓存
           httpSecurity.headers().cacheControl();
           // 添加JWT filter
           httpSecurity.addFilterBefore(jwtAuthenticationTokenFilter(), 
        		   UsernamePasswordAuthenticationFilter.class);
           //添加自定义未授权和未登录结果返回
           httpSecurity.exceptionHandling().accessDeniedHandler(restfulAccessDeniedHandler)
              .authenticationEntryPoint(restAuthenticationEntryPoint);
    }

    /** 身份认证接口 */
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(passwordEncoder());
    }

    /** 强散列哈希加密实现 */
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter() {
        return new JwtAuthenticationTokenFilter();
    }

}